# Mathematician:Otto Schreier

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## Contents

## Mathematician

Austrian mathematician who made great advances in group theory before dying unfortunately young of sepsis.

## Nationality

Austrian

## History

- Born: 3 March 1901, Vienna, Austria
- Died: 2 June 1929, Hamburg, Germany

## Theorems and Definitions

- Nielsen-Schreier Theorem (with Jakob Nielsen)
- Artin-Schreier Theorem (with Emil Artin)
- Artin-Schreier Theory (with Emil Artin)
- Artin-Schreier Polynomial (with Emil Artin)
- Artin-Schreier Extension (with Emil Artin)
- Schreier's Subgroup Lemma
- Schreier-Sims Algorithm (with Charles Coffin Sims)
- Schreier Coset Graph
- Schreier Conjecture
- Schreier Domain
- Schreier-Zassenhaus Theorem (with Hans Zassenhaus) (also known as the Schreier Refinement Theorem)

Results named for **Otto Schreier** can be found here.

Definitions of concepts named for **Otto Schreier** can be found here.

## Publications

- 1923:
*Über die Erweiterung von Gruppen*(On the extension of groups) - 1926:
*Die Untergruppen der freien Gruppe*(The subgroups of free groups)